code: def _path(task, opt, dt):
      # Build the data if it doesn't exist.
      build(opt)
      return os.path.join(
          opt["datapath"],
          "wmt",
          "{task}_{type}.txt".format(task=task, type=dt),
      )
  
file_path: ParlAI/parlai/tasks/wmt/agents.py
imports: from parlai.core.teachers import FbDeprecatedDialogTeacher
  from .build import build
  import copy
  import os
label_desc: Use image node_id 1 for calling a global function with example usage: _path(task, opt, dt) and returns: os